Pliable and soft paper and manufacture thereof



Patented Nov. 22, .1938

PATENT OFFICE PLIABLE AW "SOFT-PAPER AND MANUFAC- .TURE THEREOF FritzSommer, Berlin-Charlottenburg, Germany,

assignor to the firm:

Ohemische Fabrik Grunau, Landshoff & Meyer Akt. Ges., Berlin- Grunau,Germany, a company of Germany No Drawing. ApplicationMarch 18, 1936,Serial No. 69,531. In Germany March 27, 1935 8 Claims.

The new invention comprises a method to increase the pliancy andsoftness of paper, papercloths and paper-tissues and refers also topaper, paper-cloths and paper-tissues with an increased 5 pliancy andsoftness. I

It is known that paper is a material with little pliancy and softness.This is very disadvantageous for many a purpose. This appliesparticularly to the cases, when paper or materials manufactured of paperare intended to come in contact with the human body. There may bementioned paper baby napkins, towels and bandages for hygienic orsurgical purposes, which conv tain paper and/or cellulose wool, paperhandkerchiefs, toilet paper and other similar products. In all thesecases it is important to give to the paper the greatest pliancy andsoftness possible, in order to avoid a soreness of the skin to be causedby the friction of the paper. 20 According to the present invention, thesoftness and pliancy of paper, paper-cloths and paper-tissues isincreased by the incorporation of water soluble salts of condensationproducts of proteins or higher molecular protein cleavage higher fattyacids and resin acids into the paper pulp. A method for the productionof the condensation products is disclosed in my prior U. S.Patent'2,0l5,912 issued Oct. 1, 1935. The con-,

densation products of proteins or high molecular protein cleavageproducts and higher fatty or resin acids are usually applied in the formof an aqueous solution of their alkali salts. Instead of the alkalisalts of the condensation products of proteins orhigh molecular proteincleavage prod- 'ucts latnd higher fatty or resin acids, there can beadded the salts of such condensation products with organic. bases, whenit is desired to avoid the cloths or paper-tissues. Such organic basesonly are to be taken into account as have no irritating action on thehuman skin. The salts of .condensationproducts of proteins or high Inlecular protein cleavage products and higher f tty or resin acids withmono-, di and tri-ethanolamin are particularly suitable for thispurpose.

The additions to paper, paper-cloths or papertissues according to theinvention both increase 50' the pliancy and the softness of the paper,and also increase its absorptive power .for aqueous liquids which forinstance is particularly advantageous with paper baby napkins.

'It had already been previously suggested to 55 render paper morepliable and softer by the addiproducts of the type of lysalbinic acidand soapforming acids selected from the group containing proteincleavage products and higher fatty or addition of alkali compounds topaper, paper tion of hygroscopic compounds such as glycol derivatives.Such papers feel moist and heavy and therefore are not suitable forproducts which are intended to get in contact with the human body. Butthe paper cloths and paper-tissues 5 containing the additions accordingto theinvention are distinguished by their special softness, pliancy andabsorbing power.

The importance of the softness and pliancy of paper products may bedemonstrated as follows: Paper handkerchiefs are mainly used in case ofa heavy nasal catarrh causing an excessive consumption of handkerchiefs.The inflamed nose is particularly sensitiveandit is considered veryadvantageously when the paper of the-paper handkerchiefs is very softand pliable.

This similarly applies for instance to paper baby napkins, since theskin of the baby is particularly sensitive.

For paper tissues also the softness and pliancy of the paper is of greatimportance. This applies both to tissues consisting of paper only and tothe so-called mixed tissues which contain textile fibres in, addition tothe paper.

The required quantity of the additions of condensation products ofproteins or highmolecular resin acids varies according to the degree ofsoftness and pliancy of the paper which is desired As a rule,0.1 to 0.5%of condensation products of proteins or high molecular'protein cleavageproducts and higher fatty or resin acids will be added to the paper pulpbefore the working.

The following examples may serve the invention:

0.5% sodium oleyi-iysalbinate-referred to the weight of the air-driedfibre-are added to the paper pulp in the hollander in form of a-5%".aqueous solution and thoroughly mixed. The

resulting paper pulp is finished in the usual way. Example 2 i .When thetri-ethanolamin oleyl-lysalbinate is 5 used instead of the sodium oleyllysalbinate which was mentioned in Example 1, there are suilicient 0.3%,which are also "applied as a' 5% aqueous solution.

to illustrate "I'he..additions paper, paper-cloths and paper-tissuesaccording to the invention have no irritating action on the humanskingso that the paper products which contain these additions areparticularly suitable for. hygienic and medical purposes.

I claim: 7

1. A method of increasing the pliancy and softness of I paper,paper-cloths and papertissues, comprising the steps of preparing a paperpulp and adding thereto water soluble salts of condensation products oflysalbinic acid with soap-forming acid selected from the groupcontaining higher fatty acids and resin acids;

2., A method of increasing the piiancy and softness of paper,paper-cloths and paper-tissues, comprising the steps of preparing apaper pulp and adding thereto water soluble alkali salts 'of and addingthereto water soluble salts of condensation products of lysalbinic acidwith higher fatty acids, said salts being formed with triethanolamine.

5. Soft and pliable papers, paper-cloths and paper-tissues containingwater soluble salts of condensation products of lysalbinic acid withsoap-forming acid selected from the group containing higher fatty acidsand resin acids.

6. Soft and pliable papers, paper-cloths and paper-tissues containingwater soluble alkali salts of condensation products of lysalbinic acidwith higher fatty acids.

'7. Soft and pliable papers, paper-c1oths and paper-tissues containingwater soluble alkali salts of condensation products of lysalbinic acidwith resin acids.

8. Soft and pliable papers, paper-cloths and paper-tissues containingwater soluble salts of condensation products of lysalbinic acid withhigher fatty acids, said salts being formed with tri-ethanolamine.

FRITZ SOMMER.

